consulate in benghazi tuesday. a battle between police and protesters continued for a fourth day in cairo and in tunisia clouds of black smoke were seen as protesters stormed the gate of the u.s. embassy in tunis. friday's demonstrations were not confined to the middle east. this was the scene outside the american embassy in london. the protests seem at least in part a response to an internet movie trailer produced in the u.s. it angered muslims for its unflattering portrayal of the prophet muhammad, much like the accelerated pace of last year's arab spring, word of the video spreading across the region rapidly through social media. youtube blocked the video in egypt and in libya where those attacks on american personnel took place tuesday, the scope of which stunned the u.s. diplomatic community. an official said friday arrests had been made in connection with those killings in benghazi. >> there are reports tonight of violent protests in more than two dozen nations in northern africa, the middle east and europe.